 
 
 
21.5.2  Blackman-Harris window
The blackman_harris_window
command applies the Blackman-Harris window to a sequence or its segment.
- 
blackman_harris_window takes one mandatory argument
and two optional arguments:
- 
v, a real vector with length n.
- Optionally, m, N, a sequence of two integers (by default, m=0 and N=n).
 
- blackman_harris_window
returns the elementwise product of [vm,vm+1,…,vm+N−1]
and the vector w of length N defined by
| wk=a0−a1 cos | ⎛ ⎜
 ⎜
 ⎝
 |  | ⎞ ⎟
 ⎟
 ⎠
 | +a2 cos | ⎛ ⎜
 ⎜
 ⎝
 |  | ⎞ ⎟
 ⎟
 ⎠
 | −a3 cos | ⎛ ⎜
 ⎜
 ⎝
 |  | ⎞ ⎟
 ⎟
 ⎠
 |  
 for k=0,1,…,N−1, where a0=0.35875, a1=0.48829, a2=0.14128
and a3=0.01168.
Example
| listplot(blackman_harris_window([1$1000])) | 
 
 
